crypto/x509/x509name.c

   1 /*
   2  * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include "internal/cryptlib.h"
  12 #include <openssl/safestack.h>
  13 #include <openssl/asn1.h>
  14 #include <openssl/objects.h>
  15 #include <openssl/evp.h>
  16 #include <openssl/x509.h>
  17 #include "internal/x509_int.h"
  18
  19 int X509_NAME_get_text_by_NID(X509_NAME *name, int nid, char *buf, int len)
  20 {
  21     ASN1_OBJECT *obj;
  22
  23     obj = OBJ_nid2obj(nid);
  24     if (obj == NULL)
  25         return -1;
  26     return X509_NAME_get_text_by_OBJ(name, obj, buf, len);
  27 }
  28
  29 int X509_NAME_get_text_by_OBJ(X509_NAME *name, const ASN1_OBJECT *obj,
  30                               char *buf, int len)
  31 {
  32     int i;
  33     const ASN1_STRING *data;
  34
  35     i = X509_NAME_get_index_by_OBJ(name, obj, -1);
  36     if (i < 0)
  37         return -1;
  38     data = X509_NAME_ENTRY_get_data(X509_NAME_get_entry(name, i));
  39     if (buf == NULL)
  40         return data->length;
  41     if (len <= 0)
  42         return 0;
  43     i = (data->length > (len - 1)) ? (len - 1) : data->length;
  44     memcpy(buf, data->data, i);
  45     buf[i] = '\0';
  46     return i;
  47 }
  48
  49 int X509_NAME_entry_count(const X509_NAME *name)
  50 {
  51     if (name == NULL)
  52         return 0;
  53     return sk_X509_NAME_ENTRY_num(name->entries);
  54 }
  55
  56 int X509_NAME_get_index_by_NID(X509_NAME *name, int nid, int lastpos)
  57 {
  58     ASN1_OBJECT *obj;
  59
  60     obj = OBJ_nid2obj(nid);
  61     if (obj == NULL)
  62         return -2;
  63     return X509_NAME_get_index_by_OBJ(name, obj, lastpos);
  64 }
  65
  66 /* NOTE: you should be passing -1, not 0 as lastpos */
  67 int X509_NAME_get_index_by_OBJ(X509_NAME *name, const ASN1_OBJECT *obj, int lastpos)
  68 {
  69     int n;
  70     X509_NAME_ENTRY *ne;
  71     STACK_OF(X509_NAME_ENTRY) *sk;
  72
  73     if (name == NULL)
  74         return -1;
  75     if (lastpos < 0)
  76         lastpos = -1;
  77     sk = name->entries;
  78     n = sk_X509_NAME_ENTRY_num(sk);
  79     for (lastpos++; lastpos < n; lastpos++) {
  80         ne = sk_X509_NAME_ENTRY_value(sk, lastpos);
  81         if (OBJ_cmp(ne->object, obj) == 0)
  82             return lastpos;
  83     }
  84     return -1;
  85 }
  86
  87 X509_NAME_ENTRY *X509_NAME_get_entry(const X509_NAME *name, int loc)
  88 {
  89     if (name == NULL || sk_X509_NAME_ENTRY_num(name->entries) <= loc
  90         || loc < 0)
  91         return NULL;
  92
  93     return sk_X509_NAME_ENTRY_value(name->entries, loc);
  94 }
  95
  96 X509_NAME_ENTRY *X509_NAME_delete_entry(X509_NAME *name, int loc)
  97 {
  98     X509_NAME_ENTRY *ret;
  99     int i, n, set_prev, set_next;
 100     STACK_OF(X509_NAME_ENTRY) *sk;
 101
 102     if (name == NULL || sk_X509_NAME_ENTRY_num(name->entries) <= loc
 103         || loc < 0)
 104         return NULL;
 105
 106     sk = name->entries;
 107     ret = sk_X509_NAME_ENTRY_delete(sk, loc);
 108     n = sk_X509_NAME_ENTRY_num(sk);
 109     name->modified = 1;
 110     if (loc == n)
 111         return ret;
 112
 113     /* else we need to fixup the set field */
 114     if (loc != 0)
 115         set_prev = (sk_X509_NAME_ENTRY_value(sk, loc - 1))->set;
 116     else
 117         set_prev = ret->set - 1;
 118     set_next = sk_X509_NAME_ENTRY_value(sk, loc)->set;
 119
 120     /*-
 121      * set_prev is the previous set
 122      * set is the current set
 123      * set_next is the following
 124      * prev  1 1    1 1     1 1     1 1
 125      * set   1      1       2       2
 126      * next  1 1    2 2     2 2     3 2
 127      * so basically only if prev and next differ by 2, then
 128      * re-number down by 1
 129      */
 130     if (set_prev + 1 < set_next)
 131         for (i = loc; i < n; i++)
 132             sk_X509_NAME_ENTRY_value(sk, i)->set--;
 133     return ret;
 134 }
 135
 136 int X509_NAME_add_entry_by_OBJ(X509_NAME *name, const ASN1_OBJECT *obj, int type,
 137                                const unsigned char *bytes, int len, int loc,
 138                                int set)
 139 {
 140     X509_NAME_ENTRY *ne;
 141     int ret;
 142
 143     ne = X509_NAME_ENTRY_create_by_OBJ(NULL, obj, type, bytes, len);
 144     if (!ne)
 145         return 0;
 146     ret = X509_NAME_add_entry(name, ne, loc, set);
 147     X509_NAME_ENTRY_free(ne);
 148     return ret;
 149 }
 150
 151 int X509_NAME_add_entry_by_NID(X509_NAME *name, int nid, int type,
 152                                const unsigned char *bytes, int len, int loc,
 153                                int set)
 154 {
 155     X509_NAME_ENTRY *ne;
 156     int ret;
 157     ne = X509_NAME_ENTRY_create_by_NID(NULL, nid, type, bytes, len);
 158     if (!ne)
 159         return 0;
 160     ret = X509_NAME_add_entry(name, ne, loc, set);
 161     X509_NAME_ENTRY_free(ne);
 162     return ret;
 163 }
 164
 165 int X509_NAME_add_entry_by_txt(X509_NAME *name, const char *field, int type,
 166                                const unsigned char *bytes, int len, int loc,
 167                                int set)
 168 {
 169     X509_NAME_ENTRY *ne;
 170     int ret;
 171     ne = X509_NAME_ENTRY_create_by_txt(NULL, field, type, bytes, len);
 172     if (!ne)
 173         return 0;
 174     ret = X509_NAME_add_entry(name, ne, loc, set);
 175     X509_NAME_ENTRY_free(ne);
 176     return ret;
 177 }
 178
 179 /*
 180  * if set is -1, append to previous set, 0 'a new one', and 1, prepend to the
 181  * guy we are about to stomp on.
 182  */
 183 int X509_NAME_add_entry(X509_NAME *name, const X509_NAME_ENTRY *ne, int loc,
 184                         int set)
 185 {
 186     X509_NAME_ENTRY *new_name = NULL;
 187     int n, i, inc;
 188     STACK_OF(X509_NAME_ENTRY) *sk;
 189
 190     if (name == NULL)
 191         return 0;
 192     sk = name->entries;
 193     n = sk_X509_NAME_ENTRY_num(sk);
 194     if (loc > n)
 195         loc = n;
 196     else if (loc < 0)
 197         loc = n;
 198     inc = (set == 0);
 199     name->modified = 1;
 200
 201     if (set == -1) {
 202         if (loc == 0) {
 203             set = 0;
 204             inc = 1;
 205         } else {
 206             set = sk_X509_NAME_ENTRY_value(sk, loc - 1)->set;
 207         }
 208     } else {                    /* if (set >= 0) */
 209
 210         if (loc >= n) {
 211             if (loc != 0)
 212                 set = sk_X509_NAME_ENTRY_value(sk, loc - 1)->set + 1;
 213             else
 214                 set = 0;
 215         } else
 216             set = sk_X509_NAME_ENTRY_value(sk, loc)->set;
 217     }
 218
 219     /*
 220      * X509_NAME_ENTRY_dup is ASN1 generated code, that can't be easily
 221      * const'ified; harmless cast since dup() don't modify its input.
 222      */
 223     if ((new_name = X509_NAME_ENTRY_dup((X509_NAME_ENTRY *)ne)) == NULL)
 224         goto err;
 225     new_name->set = set;
 226     if (!sk_X509_NAME_ENTRY_insert(sk, new_name, loc)) {
 227         X509err(X509_F_X509_NAME_ADD_ENTRY, ERR_R_MALLOC_FAILURE);
 228         goto err;
 229     }
 230     if (inc) {
 231         n = sk_X509_NAME_ENTRY_num(sk);
 232         for (i = loc + 1; i < n; i++)
 233             sk_X509_NAME_ENTRY_value(sk, i)->set += 1;
 234     }
 235     return 1;
 236  err:
 237     X509_NAME_ENTRY_free(new_name);
 238     return 0;
 239 }
 240
 241 X509_NAME_ENTRY *X509_NAME_ENTRY_create_by_txt(X509_NAME_ENTRY **ne,
 242                                                const char *field, int type,
 243                                                const unsigned char *bytes,
 244                                                int len)
 245 {
 246     ASN1_OBJECT *obj;
 247     X509_NAME_ENTRY *nentry;
 248
 249     obj = OBJ_txt2obj(field, 0);
 250     if (obj == NULL) {
 251         X509err(X509_F_X509_NAME_ENTRY_CREATE_BY_TXT,
 252                 X509_R_INVALID_FIELD_NAME);
 253         ERR_add_error_data(2, "name=", field);
 254         return NULL;
 255     }
 256     nentry = X509_NAME_ENTRY_create_by_OBJ(ne, obj, type, bytes, len);
 257     ASN1_OBJECT_free(obj);
 258     return nentry;
 259 }
 260
 261 X509_NAME_ENTRY *X509_NAME_ENTRY_create_by_NID(X509_NAME_ENTRY **ne, int nid,
 262                                                int type,
 263                                                const unsigned char *bytes,
 264                                                int len)
 265 {
 266     ASN1_OBJECT *obj;
 267     X509_NAME_ENTRY *nentry;
 268
 269     obj = OBJ_nid2obj(nid);
 270     if (obj == NULL) {
 271         X509err(X509_F_X509_NAME_ENTRY_CREATE_BY_NID, X509_R_UNKNOWN_NID);
 272         return NULL;
 273     }
 274     nentry = X509_NAME_ENTRY_create_by_OBJ(ne, obj, type, bytes, len);
 275     ASN1_OBJECT_free(obj);
 276     return nentry;
 277 }
 278
 279 X509_NAME_ENTRY *X509_NAME_ENTRY_create_by_OBJ(X509_NAME_ENTRY **ne,
 280                                                const ASN1_OBJECT *obj, int type,
 281                                                const unsigned char *bytes,
 282                                                int len)
 283 {
 284     X509_NAME_ENTRY *ret;
 285
 286     if ((ne == NULL) || (*ne == NULL)) {
 287         if ((ret = X509_NAME_ENTRY_new()) == NULL)
 288             return NULL;
 289     } else
 290         ret = *ne;
 291
 292     if (!X509_NAME_ENTRY_set_object(ret, obj))
 293         goto err;
 294     if (!X509_NAME_ENTRY_set_data(ret, type, bytes, len))
 295         goto err;
 296
 297     if ((ne != NULL) && (*ne == NULL))
 298         *ne = ret;
 299     return ret;
 300  err:
 301     if ((ne == NULL) || (ret != *ne))
 302         X509_NAME_ENTRY_free(ret);
 303     return NULL;
 304 }
 305
 306 int X509_NAME_ENTRY_set_object(X509_NAME_ENTRY *ne, const ASN1_OBJECT *obj)
 307 {
 308     if ((ne == NULL) || (obj == NULL)) {
 309         X509err(X509_F_X509_NAME_ENTRY_SET_OBJECT,
 310                 ERR_R_PASSED_NULL_PARAMETER);
 311         return 0;
 312     }
 313     ASN1_OBJECT_free(ne->object);
 314     ne->object = OBJ_dup(obj);
 315     return ((ne->object == NULL) ? 0 : 1);
 316 }
 317
 318 int X509_NAME_ENTRY_set_data(X509_NAME_ENTRY *ne, int type,
 319                              const unsigned char *bytes, int len)
 320 {
 321     int i;
 322
 323     if ((ne == NULL) || ((bytes == NULL) && (len != 0)))
 324         return 0;
 325     if ((type > 0) && (type & MBSTRING_FLAG))
 326         return ASN1_STRING_set_by_NID(&ne->value, bytes,
 327                                       len, type,
 328                                       OBJ_obj2nid(ne->object)) ? 1 : 0;
 329     if (len < 0)
 330         len = strlen((const char *)bytes);
 331     i = ASN1_STRING_set(ne->value, bytes, len);
 332     if (!i)
 333         return 0;
 334     if (type != V_ASN1_UNDEF) {
 335         if (type == V_ASN1_APP_CHOOSE)
 336             ne->value->type = ASN1_PRINTABLE_type(bytes, len);
 337         else
 338             ne->value->type = type;
 339     }
 340     return 1;
 341 }
 342
 343 ASN1_OBJECT *X509_NAME_ENTRY_get_object(const X509_NAME_ENTRY *ne)
 344 {
 345     if (ne == NULL)
 346         return NULL;
 347     return ne->object;
 348 }
 349
 350 ASN1_STRING *X509_NAME_ENTRY_get_data(const X509_NAME_ENTRY *ne)
 351 {
 352     if (ne == NULL)
 353         return NULL;
 354     return ne->value;
 355 }
 356
 357 int X509_NAME_ENTRY_set(const X509_NAME_ENTRY *ne)
 358 {
 359     return ne->set;
 360 }